Scanning SQUID microscopy of vortex clusters in multiband superconductors

被引：74
|
作者：
Nishio, Taichiro [1 ]
Dao, Vu Hung [1 ]
Chen, Qinghua [1 ]
Chibotaru, Liviu F. [1 ]
Kadowaki, Kazuo [2 ]
Moshchalkov, Victor V. [1 ]
机构：
[1] Katholieke Univ Leuven, INPAC, B-3001 Louvain, Belgium
[2] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan
来源：
PHYSICAL REVIEW B | 2010年 / 81卷 / 02期
关键词：
GINZBURG-LANDAU THEORY; MGB2; VORTICES; FIELD;
D O I：
10.1103/PhysRevB.81.020506
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In type-1.5 superconductors, vortices emerge in clusters, which grow in size with increasing magnetic field. These vortex clusters and their field dependence are directly visualized by scanning superconducting quantum interference device microscopy at very low vortex densities in MgB2 single crystals. Our observations are elucidated by simulations based on a two-gap Ginzburg-Landau theory in the type-1.5 regime.
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页数：4
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